Drying furnace control method and device, electronic equipment and storage medium

Abstract

The embodiment of the invention provides a control method and device of a drying furnace, electronic equipment and a storage medium, and relates to the field of metallurgy, and the method comprises the steps of determining regulation and control target parameters and the theoretical gas amount of the drying furnace, drying the drying furnace based on the theoretical gas amount, detecting the combustion temperature, the waste gas temperature and the oxygen content of the waste gas of the drying furnace in real time, and based on the combustion temperature of the drying furnace, the temperature of the waste gas and the oxygen content of the waste gas, the opening degrees of a gas adjusting valve and an air adjusting valve of the drying furnace are adjusted, so that target parameters are adjusted and controlled, and the drying efficiency of the drying furnace is improved.

Description

Technical Field

[0001] This invention relates to the field of metallurgy, and more specifically, to a control method, apparatus, electronic device, and storage medium for a drying furnace. Background Technology

[0002] In existing lump ore drying systems, furnace temperature regulation typically relies on fixed operating settings (e.g., settings I, II, and III). Operators need to manually select and switch these settings based on observed furnace and exhaust gas temperatures, thereby indirectly adjusting the amount of combustion gas and the corresponding temperature.

[0003] The above methods rely on operators' experience to manually switch fixed gears, which cannot achieve precise and continuous adjustment, thus hindering the optimization of production efficiency and the reduction of labor costs. With only a few fixed gears, it is impossible to efficiently link them with key variables such as the flow rate and moisture content of the ore entering the furnace, making it difficult to achieve the optimal balance between drying effect and energy consumption. Summary of the Invention

[0004] The purpose of this invention is to provide a control method, device, electronic equipment, and storage medium for a drying oven, which can improve the drying efficiency of the drying oven.

[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of this application are as follows: In a first aspect, embodiments of this application provide a control method for a drying furnace, applied to a lump ore drying system, the method comprising: Determine the target control parameters and theoretical gas volume for the drying oven; The drying furnace is used to dry the gas based on the theoretical gas volume; The combustion temperature, exhaust gas temperature, and oxygen content of the exhaust gas in the drying oven are monitored in real time. Based on the combustion temperature, exhaust gas temperature, and oxygen content of the exhaust gas in the drying oven, the opening degrees of the gas regulating valve and air regulating valve of the drying oven are adjusted to achieve the control target parameters.

[0006] In an optional embodiment, the lump ore drying system includes: a gas regulating valve, a drying furnace, a dilution fan, and an air regulating valve; The gas regulating valve is connected to the drying oven, and the gas regulating valve controls the amount of gas supplied to the drying oven; The air regulating valve is connected to the drying oven, and the air regulating valve controls the amount of air supplied to the drying oven.

[0007] In an optional implementation, the step of determining the theoretical gas quantity includes: The weight of the ore blocks fed into the furnace and the moisture content corresponding to that weight are obtained in real time. Calculate the current required water content to be evaporated based on the weight of the furnace ore and the moisture content. Determine the ambient temperature and the target flue gas temperature; The theoretical gas demand is calculated based on the water content, target flue gas temperature, ambient temperature, and the amount of gas required for evaporation per unit mass of water.

[0008] In an optional embodiment, the step of adjusting the opening of the gas regulating valve and air regulating valve of the drying oven based on the combustion temperature, exhaust gas temperature, and oxygen content of the exhaust gas to achieve the target control parameters includes: The combustion temperature of the drying oven is compared with the preset combustion temperature; When the combustion temperature of the drying oven is lower than the preset combustion temperature, the opening of the gas regulating valve is increased. When the combustion temperature of the drying oven is greater than the preset combustion temperature, the opening of the gas regulating valve is reduced. or; The exhaust gas temperature is compared with the preset exhaust gas temperature; When the exhaust gas temperature is lower than the preset exhaust gas temperature, the opening of the gas regulating valve is increased. When the exhaust gas temperature is greater than the preset exhaust gas temperature, the opening of the gas regulating valve is reduced.

[0009] In an optional embodiment, the step of increasing the opening of the gas regulating valve when the combustion temperature in the drying oven is lower than the preset combustion temperature includes: Calculate the first difference between the combustion temperature of the drying oven and the preset combustion temperature; The first opening compensation value of the gas regulating valve is determined based on the first difference. The opening of the gas regulating valve is adjusted based on the first opening compensation value.

[0010] In an optional embodiment, the step of increasing the opening of the gas regulating valve when the exhaust gas temperature is lower than the preset exhaust gas temperature includes: Calculate the second difference between the exhaust gas temperature and the preset exhaust gas temperature; The second opening compensation value of the gas regulating valve is determined based on the second difference. The opening of the gas regulating valve is adjusted based on the second opening compensation value.

[0011] In an optional embodiment, the step of adjusting the opening of the gas regulating valve and air regulating valve of the drying oven based on the combustion temperature, exhaust gas temperature, and oxygen content of the exhaust gas to achieve the target control parameters includes: Compare the oxygen content with a preset oxygen content; When the oxygen content is less than the preset oxygen content, the opening of the air regulating valve is increased. When the oxygen content is greater than the preset oxygen content, the opening of the air regulating valve is reduced.

[0012] Secondly, embodiments of this application provide a control device for a drying furnace, applied to a lump ore drying system, the device comprising: The determination module is used to determine the control target parameters and theoretical gas volume of the drying furnace; A drying module is used to dry the drying furnace based on the theoretical gas volume; The detection module is used to detect the combustion temperature, exhaust gas temperature, and oxygen content of the exhaust gas in the drying oven in real time. The adjustment module is used to adjust the opening degree of the gas regulating valve and the air regulating valve of the drying oven based on the combustion temperature, exhaust gas temperature and oxygen content of the exhaust gas, so as to achieve the control target parameters.

[0013] Thirdly, embodiments of this application provide an electronic device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps of the control method for the drying oven.

[0014] Fourthly, embodiments of this application provide a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the control method for the drying oven.

[0015] This application has the following beneficial effects: This application determines the control target parameters and theoretical gas volume of the drying furnace, dries the furnace based on the theoretical gas volume, and monitors the combustion temperature, exhaust gas temperature, and oxygen content of the exhaust gas in real time. Based on these parameters, the opening of the gas regulating valve and air regulating valve of the drying furnace is adjusted to achieve the control target parameters and improve the drying efficiency of the drying furnace. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1A block diagram of an electronic device provided in an embodiment of the present invention; Figure 2 This is one of the flowcharts illustrating a control method for a drying oven provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of a lump ore drying system provided in an embodiment of the present invention; Figure 4 This is a second schematic flowchart illustrating a control method for a drying oven provided in an embodiment of the present invention. Figure 5 The third schematic flowchart illustrates a control method for a drying oven provided in an embodiment of the present invention. Figure 6 The fourth schematic flowchart of a control method for a drying oven provided in an embodiment of the present invention; Figure 7 This is a structural block diagram of a control device for a drying oven provided in an embodiment of the present invention. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0022] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0023] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] Research has revealed that in existing lump ore drying systems, furnace temperature regulation typically relies on fixed operating settings (e.g., settings I, II, and III). Operators must manually select and switch these settings based on observed furnace and exhaust gas temperatures, thereby indirectly adjusting the amount of combustion gas and its corresponding temperature.

[0025] The above methods rely on operators' experience to manually switch fixed gears, which cannot achieve precise and continuous adjustment, thus hindering the optimization of production efficiency and the reduction of labor costs. With only a few fixed gears, it is impossible to efficiently link them with key variables such as the flow rate and moisture content of the ore entering the furnace, making it difficult to achieve the optimal balance between drying effect and energy consumption.

[0026] In view of the above-mentioned problems, this embodiment provides a control method, device, electronic equipment, and storage medium for a drying oven. It can determine the target control parameters and theoretical gas volume of the drying oven, perform drying based on the theoretical gas volume, and monitor the combustion temperature, exhaust gas temperature, and oxygen content of the exhaust gas in real time. Based on these parameters, it adjusts the opening of the gas regulating valve and air regulating valve of the drying oven to achieve the target control parameters and improve the drying efficiency of the drying oven. The solution provided in this embodiment will be described in detail below.

[0027] This embodiment provides an electronic device capable of controlling a drying oven. In one possible implementation, the electronic device can be a user terminal, such as, but not limited to, a server, smartphone, personal computer (PC), tablet computer, personal digital assistant (PDA), mobile internet device (MID), and image acquisition device.

[0028] Please refer to Figure 1 , Figure 1This is a schematic diagram of the structure of the electronic device 100 provided in the embodiments of this application. The electronic device 100 may further include... Figure 1 The more or fewer components shown, or having the same Figure 1 The different configurations shown. Figure 1 The components shown can be implemented using hardware, software, or a combination thereof.

[0029] The electronic device 100 includes a control device 110 for the drying oven, a memory 120, and a processor 130.

[0030] The components of the memory 120 and processor 130 are electrically connected directly or indirectly to achieve data transmission or interaction. For example, these components can be electrically connected to each other through one or more communication buses or signal lines. The control device 110 of the drying oven includes at least one software function module that can be stored in the memory 120 in the form of software or firmware or embedded in the operating system (OS) of the electronic device 100. The processor 130 is used to execute the executable modules stored in the memory 120, such as the software function modules and computer programs included in the control device 110 of the drying oven.

[0031] The memory 120 may be, but is not limited to, Random Access Memory (RAM), Read Only Memory (ROM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), etc. The memory 120 is used to store programs, and the processor 130 executes the programs after receiving execution instructions.

[0032] Please refer to Figure 2 , Figure 2 For application Figure 1 The flowchart below shows a control method for a drying oven of an electronic device 100. The method includes a detailed description of each step.

[0033] S201: Determine the target control parameters and theoretical gas volume for the drying oven.

[0034] S202: Drying in a drying oven based on theoretical gas volume.

[0035] S203: Real-time monitoring of the combustion temperature, exhaust gas temperature, and oxygen content of the drying oven.

[0036] S204: Based on the combustion temperature, exhaust gas temperature, and oxygen content of the drying oven, adjust the opening of the gas regulating valve and air regulating valve of the drying oven to achieve the target control parameters.

[0037] The control target parameters may include combustion temperature (°C) ≥280, exhaust gas temperature (°C) 150°C±30, and feed rate control (t / h) 350±150, etc.

[0038] The theoretical gas volume is calculated using the following formula: V 煤气 == ; Where W is the mass of water to be evaporated per hour, Y is the amount of gas required to dry 1 kg of water, t1 is the target temperature of flue gas (°C), t2 is the ambient temperature, C1 is the specific heat capacity of flue gas, and Q is the calorific value of gas.

[0039] The ambient temperature can be collected in real time by a PT100 temperature sensor arranged on the outer wall of the furnace. Y is the amount of gas required to dry 1 kg of water (4.7 kg / kg·H2O), C1 is the specific heat capacity of the flue gas (1.09 kJ / (kg·℃)), and Q is the calorific value of the gas, which can be 1500 kcal / m³, or 6280 kJ / m³.

[0040] The theoretical gas quantity calculated by S201 is used as the initial opening command of the gas regulating valve. Simultaneously, the initial opening of the air regulating valve is set according to the air-fuel ratio λ=1.05, and the burner ignition program is started. This establishes a combustion baseline operating condition, avoiding thermal stress damage caused by directly heating a cold furnace to full load.

[0041] The combustion temperature of the drying oven can be measured using a dual-color infrared thermometer, model: IMPAC IGA 140, with a temperature range of 600–1800℃ and an accuracy of ±1℃. It is installed in the observation hole of the refractory brick in the middle of the furnace, away from the direct flame zone.

[0042] The exhaust gas temperature can be measured using a sheathed K-type thermocouple with an accuracy of ±0.5%FS, inserted into the exhaust gas pipe connected to the drying oven, at a distance of 3D from the oven outlet (D is the pipe diameter).

[0043] The oxygen content of the exhaust gas can be measured using a magnetic oxygen analyzer, model: Siemens Ultramat 23, with a range of 0–25% and an accuracy of ±0.1%O2. It is installed on the exhaust gas pipe and can be equipped with an automatic backflushing cleaning module.

[0044] By monitoring the combustion temperature, exhaust gas temperature, and oxygen content of the drying oven in real time, the opening of the gas regulating valve and air regulating valve of the drying oven are adjusted to achieve a combustion temperature (°C) ≥280, an exhaust gas temperature (°C) 150°C±30, and a material flow rate (t / h) of 350±150.

[0045] like Figure 3 The diagram shows a block ore drying system, which includes a gas regulating valve 1, a drying furnace 2, a dilution fan 3, and an air regulating valve 4. The gas regulating valve 1 is connected to the drying furnace 2 and controls the amount of gas supplied to the drying furnace. The air regulating valve 4 is connected to the drying furnace 2 and controls the amount of air supplied to the drying furnace.

[0046] There are multiple ways to calculate the theoretical gas volume. In one method, such as... Figure 4 As shown, it includes the following steps: S301: Real-time acquisition of the weight of the ore entering the furnace and the moisture content corresponding to the weight of the ore entering the furnace.

[0047] S302: Calculate the current water content to be evaporated based on the weight and moisture content of the ore lump.

[0048] S303: Determine the ambient temperature and the target flue gas temperature.

[0049] S304: Calculate the theoretical gas demand based on the water content, target flue gas temperature, ambient temperature, and the amount of gas required for evaporation per unit mass of water.

[0050] A high-precision dynamic weighing system can be used to determine the weight of the lump ore. A double-lever nuclear scale is installed at the head of the lump ore feeding conveyor. Its gamma-ray source penetrates the material, and the detector receives the attenuated signal. The instantaneous mass flow rate of the lump ore entering the furnace is output by the Kalman filter algorithm built into the MCU as the weight of the lump ore entering the furnace, and is refreshed periodically.

[0051] The weight of the ore fed into the furnace can also be automatically controlled. The instantaneous mass flow rate of the ore fed into the furnace is compared with the preset instantaneous flow rate. If the instantaneous mass flow rate of the ore fed into the furnace is greater than the preset instantaneous flow rate, the instantaneous mass flow rate of the ore fed into the furnace is reduced. If the instantaneous mass flow rate of the ore fed into the furnace is less than the preset instantaneous flow rate, the instantaneous mass flow rate of the ore fed into the furnace is increased.

[0052] Moisture content can be measured in real time using a microwave transmission online moisture meter. Specifically, the sensor is installed in front of the unloading point at the tail end of the belt conveyor and emits continuous microwaves at a frequency of 2.45 GHz, which can penetrate a block mineral material layer with a thickness of ≤150 mm. Based on the dielectric loss characteristics of water molecules to microwaves, combined with a material density compensation algorithm, the moisture content is output.

[0053] Based on the water content, target flue gas temperature, ambient temperature, and the amount of gas required for evaporation per unit mass of water, the theoretical gas demand is calculated, avoiding the "offline testing lag" defect—the traditional manual sampling and drying method has a delay of 2-4 hours and cannot respond to batch switching; this solution achieves millisecond-level synchronous acquisition of M and W values, ensuring the timeliness of the calculation.

[0054] The theoretical gas volume is calculated using the following formula: V 煤气 == ; Where W is the mass of water to be evaporated per hour, Y is the amount of gas required to dry 1 kg of water, t1 is the target temperature of flue gas (°C), t2 is the ambient temperature of 20°C, C1 is the specific heat capacity of flue gas of 1.09 kJ / (kg·°C), Q is the calorific value of gas, the calorific value of converter gas is 1500 kcal / m³, i.e. 6280 kJ / m³, the thermal efficiency of hot blast stove is 0.98, and the burnout rate is 0.99.

[0055] For example, assuming the lump ore has a moisture content of 8% and the dried ore has a moisture content of 4%, the hourly water volume W of the dryer is: W=1000G =1000×400× =17391.3 kg / h; G dryer drying capacity t / h.

[0056] The ambient temperature can be measured using a PT100 platinum resistance temperature sensor, which can be installed in a cool, ventilated place on the outer wall of the drying oven workshop to avoid direct sunlight and heat radiation interference. The signal is fed into the PLC after cold junction compensation, with a sampling period of 1 second.

[0057] The target flue gas temperature is not a fixed value, but a dynamic setting. Its base value is the preset exhaust gas temperature, such as 250℃, plus a fixed temperature difference, that is, the target flue gas temperature = preset exhaust gas temperature + fixed temperature difference.

[0058] Based on the combustion temperature, exhaust gas temperature, and oxygen content of the drying oven, there are various ways to adjust the opening of the gas regulating valve and air regulating valve of the drying oven to achieve the target parameters. In one method, such as... Figure 5 As shown, it includes the following steps: S401: Compare the combustion temperature of the drying oven with the preset combustion temperature.

[0059] S402: When the combustion temperature of the drying oven is lower than the preset combustion temperature, the opening of the gas regulating valve shall be increased.

[0060] S403: When the combustion temperature of the drying oven is higher than the preset combustion temperature, the opening of the gas regulating valve shall be reduced.

[0061] Based on the combustion temperature, exhaust gas temperature, and oxygen content of the drying oven, another way to achieve the control target parameters is to adjust the opening of the gas regulating valve and air regulating valve of the drying oven. This can be done by comparing the exhaust gas temperature with the preset exhaust gas temperature. If the exhaust gas temperature is lower than the preset exhaust gas temperature, the opening of the gas regulating valve is increased; if the exhaust gas temperature is higher than the preset exhaust gas temperature, the opening of the gas regulating valve is decreased.

[0062] Combustion temperature is continuously collected by a dual-color infrared thermometer installed in the observation hole of the refractory brick in the middle of the furnace. The sampling period is ≤500ms. After digital filtering and nonlinear correction, the effective temperature value is output.

[0063] The preset combustion temperature can be generated based on historical combustion data or obtained based on human experience.

[0064] For example, the combustion temperature of the drying oven is A degrees, and the preset combustion temperature is B degrees. A first difference between A and B is calculated, and this first difference is matched with multiple preset difference ranges. Different preset difference ranges correspond to different opening compensation values. For instance, the opening compensation value corresponding to the first preset difference range is opening value A, the opening compensation value corresponding to the second preset difference range is opening value B, and the opening compensation value corresponding to the third preset difference range is opening value C. The first preset difference range is smaller than the second preset difference range, and the second preset difference range is smaller than the third preset difference range. Opening value A is smaller than opening value B, and opening value B is smaller than opening value C. From the first, second, and third preset difference ranges, a preset difference range that matches the first difference is determined, and the opening compensation value corresponding to this preset difference range is determined as the first opening compensation value corresponding to the first difference.

[0065] Based on the current opening degree of the gas regulating valve, the current opening degree of the gas regulating valve is adjusted according to the first opening degree compensation value.

[0066] The method to adjust the opening of the gas regulating valve based on the exhaust gas temperature can be as follows: The exhaust gas temperature of the drying oven is A degrees, and the preset exhaust gas temperature is B degrees. A second difference between A and B degrees is calculated, and this second difference is matched with multiple preset difference ranges. Different preset difference ranges correspond to different opening compensation values. For example, the opening compensation value corresponding to the first preset difference range is opening A, the second preset difference range is opening B, and the third preset difference range is opening C. The first preset difference range is smaller than the second preset difference range, the second preset difference range is smaller than the third preset difference range, opening A is smaller than opening B, and opening B is smaller than opening C. From the first, second, and third preset difference ranges, a preset difference range that matches the second difference is determined, and the opening compensation value corresponding to this preset difference range is determined as the second opening compensation value corresponding to the second difference.

[0067] Based on the current opening degree of the gas regulating valve, the current opening degree of the gas regulating valve is adjusted according to the second opening degree compensation value.

[0068] It should be noted that the opening of the gas regulating valve can be adjusted based on the combustion temperature of the drying oven, the exhaust gas temperature, or both the combustion temperature and the exhaust gas temperature of the drying oven.

[0069] For example, the opening of the gas regulating valve can be coarsely adjusted based on the combustion temperature of the drying oven, and finely adjusted based on the exhaust gas temperature.

[0070] According to the process safety manual, when the combustion temperature of the drying furnace exceeds 950℃ or the exhaust gas temperature exceeds 90℃, emergency cold air can be added to ensure temperature stability, safety, and reliability. If the temperature continues to rise after emergency cold air addition, nitrogen can be added to ensure temperature control. The program includes a comparison program for the combustion temperature of the drying furnace during the lump ore drying process. If the furnace temperature drops by more than 70℃ within 30 seconds, or the gas pressure drops below 2.5 kPa, the drying furnace is shut down via a flameout interlock.

[0071] Based on the combustion temperature, exhaust gas temperature, and oxygen content of the drying oven, there are various ways to adjust the opening of the gas regulating valve and air regulating valve of the drying oven to achieve the target parameters. In one method, such as... Figure 6 As shown, it includes the following steps: S501: Compare the oxygen content with the preset oxygen content.

[0072] S502: When the oxygen content is less than the preset oxygen content, the opening of the air regulating valve will be increased.

[0073] S503: When the oxygen content is greater than the preset oxygen content, reduce the opening of the air regulating valve.

[0074] To overcome the risk of contamination to the sensor probe by dust, water vapor, and tar condensation during lump ore drying, the system can integrate an automatic backflushing cleaning module: a high-pressure nitrogen pulse purging is triggered every 30 minutes, and zero-point / range dual-point calibration is automatically performed before and after purging. A standard gas N2 / O2 mixture is used, with an O2 concentration deviation of <±0.02%, ensuring long-term measurement stability.

[0075] By calculating the actual deviation between the oxygen content and the preset oxygen content, the actual deviation is input to the incremental PI controller with dead zone compensation: the dead zone range is set to ±0.15% O2, thereby avoiding frequent valve operation caused by small fluctuations and extending the life of the actuator.

[0076] The proportional gain of the PI controller is adaptively adjusted according to the actual deviation. For example, when the actual deviation is <0.5%, the proportional gain of the PI controller is 0.6; when it is 0.5–2.0%, the proportional gain of the PI controller is 1.3; when it is >2.0%, the proportional gain of the PI controller is 2.5. The integration time can be fixed at 240s to ensure steady-state error-free operation.

[0077] The controller output is an incremental command for the opening degree of the air conditioning valve, which is added to the initial opening degree of the air conditioning valve. The opening degree of the air conditioning valve = initial opening degree + increment.

[0078] Valve actuators can use intelligent positioners, such as the Siemens SIPART PS2, which supports HART protocol feedback, has an opening resolution of 0.1%, and a full stroke response time of ≤ 3s, ensuring that adjustment commands are implemented accurately and quickly.

[0079] By detecting the oxygen content in the exhaust gas, the air ratio can be adjusted in real time.

[0080] Please refer to Figure 7 This application embodiment also provides an application for Figure 1 The control device 110 of the drying oven of the electronic device 100 includes: Module 111 is used to determine the control target parameters and theoretical gas volume of the drying furnace; Drying module 112 is used to dry the drying furnace based on the theoretical gas volume; The detection module 113 is used to detect the combustion temperature, exhaust gas temperature and oxygen content of the drying oven in real time. The adjustment module 114 is used to adjust the opening degree of the gas regulating valve and the air regulating valve of the drying oven based on the combustion temperature, exhaust gas temperature and oxygen content of the exhaust gas, so as to achieve the control target parameters.

[0081] This application also provides an electronic device 100, which includes a processor 130 and a memory 120. The memory 120 stores computer-executable instructions, which, when executed by the processor 130, implement the control method for the drying oven.

[0082] This application embodiment also provides a computer-readable storage medium storing a computer program, which, when executed by a processor 130, implements a control method for the drying oven.

[0083] In the embodiments provided in this application, it should be understood that the disclosed apparatus and methods can also be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0084] Furthermore, the functional modules in the various embodiments of this application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part. If the function is implemented as a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes: USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, optical disks, and other media capable of storing program code.

[0085] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0086] The above descriptions are merely various embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A control method for a drying oven, characterized in that, The method, applied to a lump ore drying system, includes: Determine the target control parameters and theoretical gas volume for the drying oven; The drying furnace is used to dry the gas based on the theoretical gas volume; The combustion temperature, exhaust gas temperature, and oxygen content of the exhaust gas in the drying oven are monitored in real time. Based on the combustion temperature, exhaust gas temperature, and oxygen content of the exhaust gas in the drying oven, the opening degrees of the gas regulating valve and air regulating valve of the drying oven are adjusted to achieve the control target parameters.

2. The method according to claim 1, characterized in that, The lump ore drying system includes: a gas regulating valve, a drying furnace, a dilution fan, and an air regulating valve; The gas regulating valve is connected to the drying oven, and the gas regulating valve controls the amount of gas supplied to the drying oven; The air regulating valve is connected to the drying oven, and the air regulating valve controls the amount of air supplied to the drying oven.

3. The method according to claim 1, characterized in that, The steps to determine the theoretical gas quantity include: The weight of the ore blocks fed into the furnace and the moisture content corresponding to that weight are obtained in real time. Calculate the current required water content to be evaporated based on the weight of the furnace ore and the moisture content. Determine the ambient temperature and the target flue gas temperature; The theoretical gas demand is calculated based on the water content, target flue gas temperature, ambient temperature, and the amount of gas required for evaporation per unit mass of water.

4. The method according to claim 1, characterized in that, The step of adjusting the opening of the gas regulating valve and air regulating valve of the drying oven based on the combustion temperature, exhaust gas temperature, and oxygen content of the exhaust gas to achieve the target control parameters includes: The combustion temperature of the drying oven is compared with the preset combustion temperature; When the combustion temperature of the drying oven is lower than the preset combustion temperature, the opening of the gas regulating valve is increased. When the combustion temperature of the drying oven is greater than the preset combustion temperature, the opening of the gas regulating valve is reduced. or; The exhaust gas temperature is compared with the preset exhaust gas temperature; When the exhaust gas temperature is lower than the preset exhaust gas temperature, the opening of the gas regulating valve is increased. When the exhaust gas temperature is greater than the preset exhaust gas temperature, the opening of the gas regulating valve is reduced.

5. The method according to claim 4, characterized in that, The step of increasing the opening of the gas regulating valve when the combustion temperature in the drying oven is lower than the preset combustion temperature includes: Calculate the first difference between the combustion temperature of the drying oven and the preset combustion temperature; The first opening compensation value of the gas regulating valve is determined based on the first difference. The opening of the gas regulating valve is adjusted based on the first opening compensation value.

6. The method according to claim 4, characterized in that, The step of increasing the opening of the gas regulating valve when the exhaust gas temperature is lower than the preset exhaust gas temperature includes: Calculate the second difference between the exhaust gas temperature and the preset exhaust gas temperature; The second opening compensation value of the gas regulating valve is determined based on the second difference. The opening of the gas regulating valve is adjusted based on the second opening compensation value.

7. The method according to claim 1, characterized in that, The step of adjusting the opening of the gas regulating valve and air regulating valve of the drying oven based on the combustion temperature, exhaust gas temperature, and oxygen content of the exhaust gas to achieve the target control parameters includes: Compare the oxygen content with a preset oxygen content; When the oxygen content is less than the preset oxygen content, the opening of the air regulating valve is increased. When the oxygen content is greater than the preset oxygen content, the opening of the air regulating valve is reduced.

8. A control device for a drying oven, characterized in that, The device is used in a lump ore drying system and includes: The determination module is used to determine the control target parameters and theoretical gas volume of the drying furnace; A drying module is used to dry the drying furnace based on the theoretical gas volume; The detection module is used to detect the combustion temperature, exhaust gas temperature, and oxygen content of the exhaust gas in the drying oven in real time. The adjustment module is used to adjust the opening degree of the gas regulating valve and the air regulating valve of the drying oven based on the combustion temperature, exhaust gas temperature and oxygen content of the exhaust gas, so as to achieve the control target parameters.

9. An electronic device, characterized in that, It includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the steps of the method according to any one of claims 1-7.

10. A storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the computer program implements the steps of the method described in any one of claims 1-7.

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